研究开发了2000 MPa级锌铝合金镀层钢丝用桥梁缆索专用高碳盘条B90SiQL,通过工艺试验,采用离线索氏体化处理来提高盘条的强度均匀性,通过钢丝加工过程中的工艺优化和过程控制生产了7.0 mm 2000 MPa级斜拉索用锌铝合金镀层钢丝新产品。B9...研究开发了2000 MPa级锌铝合金镀层钢丝用桥梁缆索专用高碳盘条B90SiQL,通过工艺试验,采用离线索氏体化处理来提高盘条的强度均匀性,通过钢丝加工过程中的工艺优化和过程控制生产了7.0 mm 2000 MPa级斜拉索用锌铝合金镀层钢丝新产品。B90SiQL盘条抗拉强度平均值为1382 MPa、断面收缩率平均值为25%;成品钢丝抗拉强度平均值为2063 MPa、扭转次数平均值为18次。均满足斜拉桥用7.0 mm 2000 MPa级钢丝技术要求。并形成规模化生产的能力。展开更多
In this study, the effect of vanadium addition(0.25%) on microstructure and hydrogen embrittlement(HE) was investigated in grade 12.9 bolt steels, and hydrogen diffusion was analyzed by hydrogen permeation.The results...In this study, the effect of vanadium addition(0.25%) on microstructure and hydrogen embrittlement(HE) was investigated in grade 12.9 bolt steels, and hydrogen diffusion was analyzed by hydrogen permeation.The results show that the addition of 0.25% vanadium in bolt steels can significantly improve the HE resistance.Vanadium addition can form a large number of vanadium precipitates, resulting in the uniform distribution of hydrogen and reduction of hydrogen accumulated at local grain boundaries, which promotes the inhibition of hydrogen-induced cracking.展开更多
文摘研究开发了2000 MPa级锌铝合金镀层钢丝用桥梁缆索专用高碳盘条B90SiQL,通过工艺试验,采用离线索氏体化处理来提高盘条的强度均匀性,通过钢丝加工过程中的工艺优化和过程控制生产了7.0 mm 2000 MPa级斜拉索用锌铝合金镀层钢丝新产品。B90SiQL盘条抗拉强度平均值为1382 MPa、断面收缩率平均值为25%;成品钢丝抗拉强度平均值为2063 MPa、扭转次数平均值为18次。均满足斜拉桥用7.0 mm 2000 MPa级钢丝技术要求。并形成规模化生产的能力。
文摘In this study, the effect of vanadium addition(0.25%) on microstructure and hydrogen embrittlement(HE) was investigated in grade 12.9 bolt steels, and hydrogen diffusion was analyzed by hydrogen permeation.The results show that the addition of 0.25% vanadium in bolt steels can significantly improve the HE resistance.Vanadium addition can form a large number of vanadium precipitates, resulting in the uniform distribution of hydrogen and reduction of hydrogen accumulated at local grain boundaries, which promotes the inhibition of hydrogen-induced cracking.